Method for evaluating performance of chemical filter for cleaning gas
US6009739A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/0454
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for evaluating performance of a chemical filter element is disclosed. A moisture content, a weight or a pressure loss of a filter element including an ion exchanger is determined, and the determined value is compared with a prescribed value. Alternatively, the determined value is converted into a residual ion exchange capacity of the filter element, and the residual ion exchange capacity is compared with a prescribed value. When the determined value or the residual ion exchange capacity is equal to or less than the prescribed value, the filter element is exchanged. On the other hand, when the determined value or the residual ion exchange capacity is more than the prescribed value, after waiting a prescribed period, the determining step and the comparing step are repeated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.